package org.eoti.math.cf.constants;

import org.eoti.math.cf.SimpleCF;

import java.math.BigInteger;

/*
 * The MIT License
 *
 * Copyright (c) 2009 Malachi de AElfweald <malachid@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
public class e
extends SimpleCF
{
	private final static BigInteger two = BigInteger.valueOf(2);
	private final static BigInteger three = BigInteger.valueOf(3);
	private boolean firstRun = true;

	public e()
	{
		super();
	}

	public BigInteger getDenominator( BigInteger index ){
		if(BigInteger.ZERO.equals(index)) return two;
		int current = (index.mod(three)).intValue();
		if(current == 2)
			return((index.divide( three )).add( BigInteger.ONE )).multiply( two );

		return BigInteger.ONE;
	}
}
